Do you know what propels an
inflated balloon when you let it go?

The air being released from the balloon is
not pushing against the surrounding air it is actually pushing against the
balloon as it is squeezed out. 11" round balloons come in assorted colors. Can
be used for propulsion experiments and science parties. Sold in bags of 12. May contain latex.

Children under 8 years can choke or suffocate on uninflated or broken balloons. Adult supervision required. ...